Courts will likely try to decide if Trump intended his travel ban as a Muslim ban when ruling on it

Ethinic Yemenis and supporters protest against President Donald Trump's executive order temporarily banning immigrants and refugees from seven Muslim-majority countries, including Yemen on February 2, 2017 in the Brooklyn borough of New York City.
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Washington state's attorney general has promised to uncover "what truly motivated" President Donald Trump's executive order on immigration, an approach that could prompt a rare public examination of how a U.S. president makes national security decisions.

The presidential order imposed a temporary ban on travelers from seven predominantly Muslim countries, but a federal judge has barred enforcement of the order while the court considers a challenge brought by Washington state.

On Thursday, the U.S. Court of Appeals for the 9th Circuit left the judge's ruling in place without deciding the ultimate merits of either side's arguments.

In its decision, the 9th Circuit cited a previous case establishing that "circumstantial evidence of intent, including … statements by decisionmakers, may be considered in evaluating whether a governmental action was motivated by a discriminatory purpose."

The Trump administration has argued that the ban is necessary to prevent potential terrorists from entering the country and is not discriminatory because the text of the order does not mention any particular religion.

Washington Attorney General Bob Ferguson signaled on Sunday that he will move aggressively to obtain written documents and emails authored by administration officials that might contain evidence the order was unconstitutionally biased against Muslims or Islam. He also said he would also move to depose administration officials.

Legal scholars say this could move the court into uncharted waters.

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"The idea of looking at motive has never really been applied to the president," said John Yoo, a former Justice Department lawyer in the George W. Bush administration.

"It would represent a serious expansion of judicial oversight of what the president and the entire executive branch does," said Yoo, now a professor at the University of California at Berkeley School of Law.

Scrutinizing campaign statements

Getty/Alex Wong

Trump has harshly criticized the federal judge in Washington for his decision and a top White House aide on Sunday accused the 9th Circuit of a "judicial usurpation of power."

U.S. courts have historically been careful about probing the motives behind laws, in part out of respect for the separation of powers between branches of government. But on questions of racial or religious discrimination, they have sometimes allowed intent to be examined.

In 1993, for instance, the Supreme Court found that an ordinance banning animal sacrifice in Hialeah, Florida, though neutral on its face, was actually intended to discriminate against a Santeria church, which holds sacrifice as a sacred rite.

Stephen Griffin, a professor of constitutional law at Tulane University, said cases like this make it clear that the court can look beyond the words of Trump's executive order. "Motive is relevant," he said.

One question in the current case is likely to be which, if any, of Trump's statements should be admissible in examining the administration's motives in issuing the order.

"If you're allowed to use evidence from the campaign, the state's case is very strong," said Griffin.

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In December, 2015, days after a mass attack by an Islamic State sympathizers in San Bernardino, California, Trump called for "a total and complete shutdown of Muslims entering the United States until our representatives can figure out what is going on." He later said he supported only suspending immigration from areas with a history of terrorism.

Stanford University Law School professor Michael McConnell, a former federal appeals judge, said the court should not consider campaign statements, because Trump only swore an oath to uphold the Constitution after he became president.

In its complaint, Washington cited an interview the president did on the day the order was signed with the Christian Broadcasting Network, saying he would prioritize Christians in the Middle East for admission as refugees.

Who can be questioned?

Former New York City Mayor Rudy Giuliani on MSNBC.
MSNBC

Legal experts are divided on whether the state's lawyers should be allowed to question the president's advisers - and possibly even the president - in depositions. The White House could potentially claim executive privilege, which protects the president and other officials from subpoena, said Thomas Lee, an expert in constitutional law at Fordham University.

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Anna-Rose Mathieson a partner with the California Appellate Law Group said that one person who might be more easily deposed would be presidential adviser and former New York City Mayor Rudolph Giuliani, who told Fox News the president had asked him to put a commission together to figure out how to make a Muslim ban legal.

David Pressman, a partner at Boies Schiller Flexner and former assistant secretary of Homeland Security in the Obama administration, said there are important protections in place so that the executive branch can receive national security advice.

"You don't want a situation in which courts are adjudicating intelligence that is coming to the executive when trying to formulate policy," said Pressman. Though in this case, Pressman said he did not believe the national security argument for the order was clear, opening the door to further questioning.

The next steps in the case are not certain.

The Trump administration has said it is considering appealing the 9th Circuit ruling to the Supreme Court, and the 9th Circuit itself might decide to rehear the case with a larger panel of judges. The president has also said he might replace the order with "a brand new" one, which could end the current legal action.